Please use this identifier to cite or link to this item:
Study on the Characteristics of Runoff for the Guandaushi Forest Watershed
|關鍵字:||Guandaushi Watershed;關刀溪集水區;Characteristics of Runoff;Unit Hydrograph;逕流特性;單位歷線||出版社:||水土保持學類||摘要:||
The purpose of this study is to know the relation between rain
and runoff for a small watershed in the Guandaushi Basin by
applying Nash''s instantaneous unit hydrograph and dimensionless
unit hydrograph to analyze the characteristics of runoff in this
watershed based on the unit hydrograph theorem. The results are
summarized as follows:1. When the infiltration rate of the
watershed was unknown, the recession constant method was more
suitable for baseflow separation. When the rainfall intensity
was greatly higher than the infiltration rate, the method of
fixing the rising slope of baseflow should be easier to
analyze.2. Because the antecedent baseflow affected greatly the
result of fitting, soil water content seemed to be an important
factor affecting the characteristics of runoff for this
watershed. The unit hydrograph theorem would be suitable with
the high antecedent baseflow and the high rainfall intensity.3.
The recession of stormflow in this watershed was very low, and
using the instantaneous unit hydrograph combined with two gamma
distribution functions instead of the Nash''s instantaneous unit
hydrograph appeared to reflect this characteristics .4. The type
of runoff in this watershed may be the subsurface stormflow or
the saturation overland flow.5. The increase of baseflow is
positively relation to rainfall amount in this watershed, and
the average runoff coefficient of this watershed is very low.
Therefore, the capability of water conservation in this
watershed seems very high.
|Appears in Collections:||水土保持學系|
Show full item record
TAIR Related Article
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.